Design comparison of single-anode and double-anode 300-MW magnetron injection gun

Lawson, W.; Specht, V.

doi:10.1109/16.216439

Cited by 30 publications

(5 citation statements)

References 12 publications

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“…Such a magnetron injection gun has been designed [25], and the construction of a broadband output window is difficult but feasible [26]. And, just as important, the close agreement between theory and experiment gives us confidence in our ability to design stable gyrotwistrons at signifi-cantly higher power than the one described here.…”

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confidence: 71%

High power operation of anX-band gyrotwistron

et al. 1994

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We report the first experimental verification of a gyrotwistron amplifier. The device utilized a single 9.858 0Hz, TED&z cavity, a heavily attenuated drift tube, and a long tapered output waveguide section. With a 440 kV, 200 -245 A, 1 ps electron beam and a sharply tapered axial magnetic field, peak powers above 21 MW were achieved with a gain near 24 dB. Performance was limited by competition from a fundamental TE&z mode. A multimode code was developed to analyze this system, and simulations were in good agreement with the experiment.PACS numbers: 85.10.Jz, 41.75.Ht Devices based on the cyclotron maser instability [1,2] have proven to be efficient, high power, high frequency rf sources (see, e. g. , [3]). Oscillator configurations in-

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confidence: 71%

High power operation of anX-band gyrotwistron

et al. 1994

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“…The synthesis method has been developed to design the standard triode-type MIG [15][16][17][18]. Based on the conservation of angular momentum in the electron gun region, it has 2 = 0 ( 0 2 − 0 2 ) (1) where , 0 are the magnetic fields at the cathode and the interaction region.…”

Section: Operation Of the Migmentioning

confidence: 99%

Magnetron Injection Gun for High-Power Gyroklystron

Zhang

Nix

Cross

2020

IEEE Trans. Electron Devices

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A magnetron injection gun (MIG) can generate an annular electron beam with a high transverse-to-axial velocity ratio for gyrotron devices. This paper compares the different configurations of the MIGs and their suitable applications were analyzed from the theoretical study. Following that, a MIG for a 48 GHz, 2 MW output power gyroklystron was designed and optimized by parameterizing the MIG's geometry and the magnetic field. By using the standard triode-type configuration, a low alpha spread of 8.9% was achieved. The simulation results showed that the magnetic field profile also plays an important role in the MIG design. The angle of the magnetic field on the emitter surface affects the alpha value and the alpha spread, which was not able to be predicted by the synthesis method. It provides an extra degree of freedom for tuning the MIG's performance in the experiment where the geometry of the gun is fixed.

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“…The Ka-band gyroklystron is driven by a triode type MIG which can generate small-orbit electrons [11,[13][14][15]. Compared with the diode type MIG, the triode type provides better control of the beam parameters, especially the beam velocity ratio (v t /v z , where v t and v z are the transverse and axial velocity components, respectively) [11,14,15]. By adjusting the modulating anode voltage, the velocity ratio of the electron beam can be fine-tuned without incurring obvious deterioration of the velocity spread.…”

Section: Mig Designmentioning

confidence: 99%

Design of a Ka‐band MW‐level high efficiency gyroklystron for accelerators

Wang

Dong

et al. 2018

IET Microwaves, Antennas & Propagation

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Design of a three-cavity Ka-band MW-level gyroklystron operated at the fundamental TE02 mode is presented in this paper. The initial design of the magnetron injection gun (MIG) and interaction circuit has been completed by using the PIC (Particle in cell) code MAGIC. The PIC simulation shows this gyroklystron can deliver an output power of more than 1.5 MW with a gain of > 35 dB at 36 GHz. The achieved efficiency exceeds 40 % when driven by a 95 kV, 45 A beam. The optimized MIG has a transverse velocity spread of less than 2.5% when the velocity ratio is around 1.3.

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Design comparison of single-anode and double-anode 300-MW magnetron injection gun

Cited by 30 publications

References 12 publications

High power operation of anX-band gyrotwistron

High power operation of anX-band gyrotwistron

Magnetron Injection Gun for High-Power Gyroklystron

Design of a Ka‐band MW‐level high efficiency gyroklystron for accelerators

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